Answer:
x = -3, y=2
Step-by-step explanation:
x+3y =3
3y -2x =12
Solve the first equation for x
x = 3-3y
Substitute this into the second equation
3y -2(3-3y) =12
Distribute
3y -6 +6y =12
Combine like terms
9y -6 =12
Add 6 to each side
9y-6+6 =12+6
9y =18
Divide each side by 9
9y/9 =18/9
y = 2
Now find x
x = 3 -3y
x = 3-3(2)
x = 3-6
x = -3
Cost of the total miles travelled
= $191.24 - $17.99
= $173.25
Miles travelled
= $173.25 ÷ 0.75
= 129.9375 miles
≈ 130 miles (3s.f)
For a, we have 42in/9ft. Since 12 inches are in 1 foot, we can multiply it by that to get (42in/9ft)*(1ft/12inches) = 42/108. We put the foot on the top of 1ft/12in to cancel them out. Since 2 goes into both 42 and 108, we divide it by 2/2 to get 26/54. Repeating the process again, we get 13/27
If we were to say that there are 12 inches in a foot and therefore divide 42 by 12 (to get 42 inches in feet), we'd get the same answer due to that 1 foot is equal to 12 inches and if you were to divide it by 1 foot/12 inches, since they are the same thing, you get the same answer
For c, since it may be hard to get (42/12)/9, it could just be easier to have 42/(9*12)=42/108
Answer:
c
Step-by-step explanation:
Answer:
B) i correct
Step-by-step explanation:
According to the examination, the longer a student takes to hit, then the closer the ball is to the hole, therefore there is correlation. Now, this doesnt imply that in order to make it closer to the ball you just need to wait longer because that doesnt seem true. Probably the most skilled students take some time to hit in order to make the hit accurate, thus the longer the hit the closer the ball is to the hole (because they were hit by skilled students). This is just an hypothesis though, but it is still true that it will be needed more studies to determine if there is causation or not; so i stay with option B.
